<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="msg">
        <!--使用过滤器-->
        {{msg|upperCase|asterisk}}
    </div>
</body>
<script>
    //声明全局过滤器
    Vue.filter('asterisk',function(val){
      return val.toUpperCase();
    })
    Vue.filter('asterisk',function(val){
        var reg = ^d/g;
        return val.replace(reg,'*');
    })
    var app = new Vue({
    el:'#app',
    data:{
        msg:''
    },
});
</script>
</html>